what are the three classes of levers

The three classes of levers are:

1. First-class lever — the fulcrum is in the middle.
2. Second-class lever — the load is in the middle.
3. Third-class lever — the effort is in the middle.

Quick memory tip

Think F-L-E :

• F irst class: F ulcrum in the middle.
• S econd class: L oad in the middle.
• T hird class: E ffort in the middle.

Examples

• First-class: seesaw, scissors, crowbar.

• Second-class: wheelbarrow, bottle opener, nutcracker.

• Third-class: forearm, sugar tongs.

If you want, I can also turn this into a one-line answer for homework or a simple diagram.